We no longer host any copies of the version 3.x binaries. Development on the Windower 3.x branch was officially discontinued on March 10th, 2013. The last release was Windower 3.432 released March 7th. It continued to work until March 27th, 2013, when the release of Seekers of Adoulin broke one of the function hooks, rendering it inoperable. So, even if you find a copy of it somewhere (there are still a few versions of it floating around the internet), it will immediately crash on load.
As far as I'm aware, no version of Wine has ever supported Windower 3 or 4, anyway. Both versions rely on functionality that Wine currently doesn't provide. Wine support is something I would like to have for Windower 5, but it is a low priority goal.